1. How many moles are 1.50 x 10+25 atoms of phosphorous?
Show work!!

24.9moles

Explanation:

1mole of a substance contains 6.02x10^23 atoms.

It therefore means that 1mole of phosphorus also contains 6.02x10^23 atoms.

We, need to find the number of moles of phosphorus that contains 1.50x10^25 atoms.

This can be done below

If 1 mole of phosphorus contains 6.02x10^23 atoms,

Therefore Xmol of phosphorus will contain 1.50x10^25 atoms. i.e

Xmol of phosphorus = (1.50x10^25)/6.02x10^23 = 24.9moles

Therefore, 24.9moles of phosphorus contains 1.50x10^25 atoms